title: Highly efficient visible light-induced O₂ generation by self-assembled nanohybrids of inorganic nanosheets and polyoxometalate nanoclusters.
abstract: Unusually high photocatalytic activity of visible light-induced O₂ generation can be achieved by electrostatically-derived self-assembly between exfoliated Zn-Cr-LDH 2D nanosheets and POM 0D nanoclusters (W₇O₂₄⁶⁻ and V₁₀O₂₈⁶⁻) acting as an electron acceptor. This self-assembly can provide a high flexibility in the control of the chemical composition and pore structure of the resulting LDH-based nanohybrids. The hybridization with POM nanoclusters remarkably enhances the photocatalytic activity of the pristine Zn-Cr-LDH, which is attributable to the formation of porous structure and depression of charge recombination. Of prime interest is that the excellent photocatalytic activity of the as-prepared Zn-Cr-LDH-POM nanohybrid for visible light-induced O₂ generation can be further enhanced by calcination at 200 °C, leading to the very high apparent quantum yield of ∼75.2% at 420 nm. The present findings clearly demonstrate that the self-assembly of LDH-POM is fairly powerful in synthesizing novel LDH-based porous nanohybrid photocatalyst for visible light-induced O₂ generation.
authors.affiliation: Center for Intelligent Nano-Bio Materials-CINBM, Department of Chemistry and Nano Sciences, Ewha Womans University, Seoul 120-750, Korea.
authors.forename: Jayavant L
authors.initials: JL
authors.lastname: Gunjakar
authors.forename: Tae Woo
authors.initials: TW
authors.lastname: Kim
authors.forename: In Young
authors.initials: IY
authors.lastname: Kim
authors.forename: Jang Mee
authors.initials: JM
authors.lastname: Lee
authors.forename: Seong-Ju
authors.initials: SJ
authors.lastname: Hwang
mesh_terms: D007287:Inorganic Chemicals / Q000737:chemistry*; D008027:Light; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology; D010100:Oxygen / Q000737:chemistry*; D033362:Powder Diffraction; D017973:Tungsten Compounds / Q000737:chemistry*; D000099294:Polyoxometalates
chemical_list: D007287:Inorganic Chemicals; D010100:Oxygen; D017973:Tungsten Compounds; C102296:polyoxometalate I; D000099294:Polyoxometalates